Gun barrel



May 20 1924.

K. F. ADAMSON GUN BARREL Filed March 1?. 1923 2 Sheets-Sh et 1 INVENTOR K. ITAdamson ATTORNEY.

May 20 1924.

K. F. ADAMSON GUN BARREL Filed March 17. 1923 2 Sheets-Sheet 2 INVENTOR Klfldamson A TTORNE Y Patented May 20, 1924.

UNI-T ED STAT ES KEITH F. ADAMSON F CLEVELAND, OHIO.

GUN BARREL.

Application filed March 17, 1923; Serial No. 625,924.

(FILED UNDER THE ACT- OF MARCH 3, 1883, 22- STAT. L., 625.)

To all whom it may concern:

Be it known that I. F. ADAMSOX,

a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented. an Improvement in Gun Barrels, of which, the following is a specification.

The invention described herein may be used by the Government, or any of its of- 1 ficers or employees in prosecution of work for the Government, or .byany other person inv the; United States, without payment to me of any royalty thereon, in accordance with the'act of March 3, 1883.

The subject of thisvinvention: is a gun barrel and relates, more specifically, to a coupling for gun barrels.

Modern warfare has demonstrated the desirability of guns of considerable range and consequently long barrels; ones of shorter range and easily transported so as to accompany infantry when desired and ones which may be used as mortars.

To provide a gun which will answer the 2 various purposes requires a single mount with a number of barrels or with a single barrel divided into sections so that the barrel may be lengthened or shortened as required by the varying situations in which it may be used.

To provide such a sectional barrel it is essential that a coupling be had which will draw the sections firmly together and will hold them so, which may be quickly operated to couple and uncouple the sections and which will permit of the sections being properly positioned with respect to each other.

The present. invention has been devised to accomplish, amongst others, the above stated desirable objects.

With the foregoing and other objects in view, the invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

One practical embodiment of the invention is illustrated in the accompanying drawings, wherein:

Fig. 1 is a longitudinal sectional view of a coupling constructed in accordance with my invention;

Figs. 2 and 3 are views in elevation of abutting ends of barrel sections.

Referring to the drawing by numerals of reference:

A gun barrel is shown as made up of sections 1 and 2, the number of sections depending uponthe usesto which the gun is to be put, abutting ends of the sections adapted to telescope to: form a perfect joint.

The end. of section: 1 is reduced and threaded at 3 to receive a jam nut 4. Adjacent the threaded portion 3 the end is further reduced and has cut therein threads 5, which are preferably heavy square threads. Between the threads 5 and the end of the section a groove 6 is formed, the groove having the same pitch as the threads 5. The end of this section is provided with an annular rib or tongue 7 adapted to enter a smaller groove 8 formed in the end of the section 2 when the two sections are drawn together. Grooves 9 are cut in the inner face of section 1 and extend for a short distance longitudinally thereof to receive the spaced apart splines or ribs 10 formed on the outer surface of the reduced portion 11 of the section 2, such reduced portion being adapted to telescope into the end of section 1. Interrupted threads 12 are provided on an enlarged portion 13 of section 2 and these threads have a pitch less than that of the threads 5.

A coupler 14 encircles the abutting ends of the sections 1 and 2 and is internally threaded to engage the threads 5 of section 1 and is provided with an inwardly projecting lug, such as the screw plug 15, the end of which projects into the groove 6 to hold the coupler assembled on the end of section 1. The coupler is also provided with interior interrupted threads 16 adapted to engage the interrupted threads 12 and so look the sections together. Since the pitch of the threads 5 is greater than that of the interrupted threads 12 rotation of the conthreads, means for locking the coupler to the section to permit annular and longitudinal movement of the coupler, an annular tongue formed on the end of the sec tion, a second section having a reduced end adapted to telescope into the first section, splines on the reduced end adapted to enter the grooves of'the first section, said second section having an annular groove for the reception of the tongue and interrupted threads formed on second section for engagement with the interrupted threads of the coupler, the-pitch ofsuch' interrupted pier and first section.

threads being'less than that of the threads forming the engagement between the cou- 2. A coupling for gun barrels, embody ing a barrel section provided with grooves,

spaced apart about the'interior thereof, a coupler threaded on said section, a second section, a reduced end on the second sec tion adapted to telescope into the end of the first section, splines formed on the reduced end adapted to enter the grooi'es and threads on the second section adapted for engagement with the coupler, said threads extending in the same direction as but of less pitch than the threads connecting the Y coupler to the first section.

3.- A coupling for gun barrels, embodying adjoining sections, threads on abutting ends of the sections turned in the same direction but of unequal pitch and a coupler adapted for threading engagement with the threads on the section.

at. A coupling for gun barrels, embodying adjoining sections, threads of unequal pitch on abutting ends of the-sections. a sleeve adapted for threaded engagement with the threads on the sections, one of said sections provided with a groove :of the same pitch as the threads of saidsection, and a lug carried by the coupler and-tproj-ecting into the groove to lock the'coupler to the section and permit angular and longitudinal movement thereof.

" KEITH 

